////////////////////////////////////////////////
// DESCRIPTION:
//    FusionWare CRT initialization
//
// Legal Notices:
//     Copyright (c) 2008, Telliam Consulting, LLC.
//     All rights reserved.
//
//     Redistribution and use in source and binary forms, with or without modification,
//     are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright notice,
//       this list of conditions and the following disclaimer.
//
//     * Redistributions in binary form must reproduce the above copyright notice,
//       this list of conditions and the following disclaimer in the documentation
//       and/or other materials provided with the distribution.
//
//     * Neither the name of Telliam Consulting nor the names of its contributors
//       may be used to endorse or promote products derived from this software
//       without specific prior written permission.
//
// Disclaimer:
//     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
//     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
//     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
//     IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
//     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
//     BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
//     DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
//     LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
//     OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
//     OF THE POSSIBILITY OF SUCH DAMAGE.  
//

#include <wtypes.h>
#include <cmnintrin.h>
#include "FusionWare\CRT.h"

using namespace FusionWare;

////////////////////////////////////////////////////////////////
// Description:
//   Initialize the heap for the boot
//
// Input:
//   HeapBase  - Base address of the Heap (Physical)
//   HeapSize  - Size of the heap in bytes
//
// Remarks:
//   
extern "C" void InitHeap(DWORD HeapBase, DWORD HeapSize, bool ForceFullInit);

extern "C" void _cinit(void);

namespace FusionWare
{
	namespace CRT
	{
		// Performs C++ initializations since C/C++ runtime is not present to do it automatically
		void StaticInit(DWORD HeapBase, DWORD HeapSize, bool ForceFullInit/*=true*/)
		{
			static bool CppInitComplete = false;
    
			// Don't allow multiple inits!
			if(CppInitComplete)
			   return;
    
			// if needed init the heap
			if(HeapBase !=0 && HeapSize!=0) 
				InitHeap(HeapBase, HeapSize, ForceFullInit);

			// Now do official CRT init. 
			_cinit();
			CppInitComplete = true;
		}
	}
}

// The following functions keep linker happy as static destructors 
// are generated (but will never be called)
extern "C"
{
    // static destructors are generated (but will never be called)
    int __cdecl atexit(void (__cdecl *)(void))
    {
        return 0;
    }

// turn off intrinsics for these to build correctly
// fulllibc.lib does not contain these functions
// so this is needed.
// REVIEW: Is this only needed in debug builds with optimization/intrinsics disabled?

#if _INTRINSIC_IS_SUPPORTED(wcslen)
#pragma function(wcslen)
#endif
    size_t wcslen(const wchar_t* pWstr)
    {
        const wchar_t *eos = pWstr;
        while( *eos++ )
            ;
        return( (size_t)(eos - pWstr - 1) );
    }

#if _INTRINSIC_IS_SUPPORTED(wcscpy)
#pragma function(wcscpy)
#endif

    wchar_t* wcscpy(wchar_t *pDst, const wchar_t *pSrc)
    {
	    wchar_t * pIt = pDst; // hang on to pDst for return
        while( *pDst++ = *pSrc++ ) { }
	    return pDst;
    }
}

